The bare NSs Model and The Case of RX
J1856.5-3754
For the surface
layers of RX J1856.5-3754 to be in form of condensed iron Þ B ğ 3-5 x1013 G, high but well below the magnetar range
For such Bıs:
featureless 0.1-2 keV spectrum. Deviations
from a bb distribution less than 4%
Compatible with
the constraints from the bow-shock nebula: B12 t6 ~ 3 (star age ~ 105 yrs)
v Well within the
~10% accuracy limit for spectral fit to Chandra data / calibration uncertainties of the
LETGS (Braje & Romani, 2002; Drake et
al, 2002)